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Dec 5, 2012 8:00am PST
into confirming that einstein was right. let me say a neat thing about science too. in a lot of fields, there'll be some sort of hero like einstein's our hero, here. we all love einstein. most of us do, yeah. so, einstein's our hero, and you tend to think, "well, if he's a hero, you don't wanna take shots at him." but in science, it's different. in science, say "hero-schmero." everybody is trying to crack that hero and find something wrong. everyone's attacking to see if they can find something wrong. and so science doesn't rest upon the reputation of some hero. science rests upon everyone else trying to find a crack in that theory. and all attempts, so far, have only gone on to substantiate this: time really is different when you're moving. but i'll tell you what? we're gonna talk more about these ideas next time and you know what i wanna do for you now? i wanna share with you a film that a friend of mine made way back in 1976. when i was teaching these ideas in the early '70s, i discovered this kind of treatment at the class board. that's one thing about teaching, you learn at the class boa
Dec 6, 2012 8:00am PST
, that's junior high school knowledge, yeah, anyone takes a science course. what we wanna know is why all that energy, and i have a model for you to consider. and it has to do with mass. see on the table here, i have-- oh, it's imagination time. look, i have all the 92 elements in the periodic table that's found commonly in the earth's crust, almost all 92, are all arranged here. see the hydrogen here? see the hydrogen atom? what's this one here? helium. helium. what's this one? lithium. lithium. i got no names, but you can just kinda look at them, right? what's the next one? i keep running after you. i know what the last one is. you guys know what the last one is, 92? begins with u. uranium. uranium. excellent. okay. and so i have all the atoms all lined up here. can you see them? at least in your mind's eye. now what i'm gonna do is i'm gonna shake the atoms. i'm gonna take the hydrogen-- just the nucleus of the atom, okay? i take the hydrogen, i shake it back and forth, okay? now, it's harder to shake the helium. how come? because it has more mass. there's four nucleons. over here is o
Dec 6, 2012 11:00am PST
, ecology is an integrative science, bringing together many pblems into one view. ecologist daelepstadisesearchi . whether he gheria inhe forescanopy ecologist daelepstadisesearchi . or mng ion compute a spatial pepectivis essential whether he gheria inhe forescanopy the future othe amazon, undstan t future. tonderstan we really haveo go back in time and ink about the first people who arrived in t amazoazon, undstan t future. tonderstan who camep the vers-- and ink about the first people who arrived in t amazoazon, and even these psentedobsta. undstan t future. tonderstan ifouo rth on many ofseibutars--s who andsp the vers-- rrator:chthe veaffis atoawhh locat nearheouth oe amazon. when european settlers arrived in amazoa in t 1h century and built cities like belém, the rain forest was seen as a rich, but impenetrableesource. until the 1970s, belém was accessible to the rest of brazil only by water. then came a wave of road building. so far, the major investmes theaerenof the basure coenatg thanalong e sout a wave of road building. withoaou have cheapernvcesso th, thea
Dec 7, 2012 3:00pm PST
find something else out about them. keach: barbour's curiosity led him to the modern science of fingerprints where he discovered that with a large enough sample he might be able to discern the gender of the person who made the print. males have wider ridges. females have narrower ones. through trial and error, he devised a technique to make permanent molds of the fingerprints. from these he began to construct a sample. finally, an intriguing discovery -- direct evidence that one set of workers was being replaced by another. barbour: it appears that the early handmade figurines were made by females. after the establishment of apartment compounds in teotihuacan about 250 a.d., you get a shift to wider ridges on the late handmade figurines and the early moldmade figurines. so it appears that when you have the development of the apartment compound that males come into the industry. keach: so as the city grew, the figurine industry changed. initially worked by women, probably as part of their domestic duties, it became a separate full-time specialization performed by men. with men
Search Results 0 to 3 of about 4